Wristwatch



FIG. 1 is a bottom, right front perspective view of my new design for a wristwatch showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The structural features depicted by broken lines in FIGS. 1-6 are shown for the purpose of illustrating portions of the wristwatch that form no part of the claimed design. 

CLAIM The ornamental design for a wristwatch, as shown and described. 